License: $289 per license
Support: $99/year per license
Add'l costs: dedicated server and SQL server $667 plus $146 CAL
SourceGear Vault is a client/server system for Windows developers with remote access via HTTP. It's positioning itself as the replacement for VSS. Vault is a good system. It does require, however, a dedicated central server. If you don't have one, this will run you thousands of dollars. Vault uses compression and binary deltas which are used in both directions to minimize network traffic. Vault only supports Visual Studio integration.